Determine the percentage composition of each of the following compounds

a) NaCl
b) AgNO3
c) Mg(OH)2

5 answers

for NaCl i got na=23/135=0.17 x 100= 17% Cl=35/135=0.26 x 100=26%

for AgNO3 i got 108/42 which im sure was wrong and i didn't get how to complete the problem..
for Mg(OH)2 i didn't have a clue

please help!
thanks in advance

I don't understand what you are asking for. Do you want the percent by mass of each element in the compound? Or by atom or mole? For example, NaCl is clearly 50% Na by ATOM. By mass, Na is 23.0 of the total molar mass of 58.5, or 39.3%

Do the others the same way, if that is what the question is all about.

Molecular mass

Solve it 4 me

go go go go